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Expired Canadian patentCanada

Apparatus for processing cattle excrement

CA 1048337 A · Owner: Babson Bros. Co. · Inventors: Shulick, Robert J.; Swanson, Roger; Thompson, Duncan M.

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Disclosed is an apparatus for separating from ruminant animal feces the undigested fibrous material that is preponderantly short pieces which consist of bundles of capillary tubes. The apparatus includes a supply tank to receive a slurry that contains ruminant animal feces and added liquids including urine with means in the supply tank for agitating the slurry to make it substantially homogeneous. A first stage separator separates the slurry into a filtrate consisting preponderantly of liquid and fine solids and a, filter mass consisting preponderantly of the short pieces of fibrous material. The first stage separator includes a first stage hopper, a foraminous separator drum which is …

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Granted February 13, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 13, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedFebruary 13, 1979
Term endedFebruary 13, 1996
Patent numberCA 1048337 A
Classification (IPC)B30B3/00 +1 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedFeb 13, 1979Term endedFeb 13, 1996

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.